App compatibility
MacDupl doesn’t keep a whitelist — it detects each app’s underlying engine and applies the matching isolation strategy. That means broad families of apps work automatically, including ones not listed here.
The definitive answer for your Mac: download the free trial — the built-in scanner classifies every app in your Applications folder instantly.
Electron apps
Full isolation — separate logins, cache, and credentials per instance.
Chromium browsers & apps
Full isolation with completely separate browser profiles.
Firefox & Gecko apps
Full isolation via dedicated profiles.
Native apps Beta
Isolated home directory per instance — experimental. Rule of thumb: if a non-sandboxed app is offered both in the App Store and as a direct download from the vendor’s site, install the direct download — that’s the one MacDupl can clone. (Sandboxed App Store apps are a separate case — see below.)
App Store apps Beta
Some Apple-provisioned App Store apps can now be cloned: MacDupl gives each instance its own app-group containers and a private keychain, so it keeps its own data without touching your original. This is new and app-specific — currently WhatsApp and WeChat. These instances run with one of macOS’s protections (the hardened runtime) switched off, which is why the tier is Beta; your original app keeps all of its protections. App Store instances also get no push notifications and no iCloud.
Sandboxed App Store apps Not supported
These can’t be cloned with real isolation, so MacDupl hides them from the picker rather than offer a clone that would silently share your original account. Two reasons: their Apple-provisioned entitlements can’t survive MacDupl’s local re-sign, and their data lives in a shared app-group container that macOS keys globally — a clone would read and write the original’s databases. This applies to App Store builds and other Apple-provisioned apps; direct-download apps that merely opt into the sandbox on their own (like CapCut) clone fine. WhatsApp and WeChat are the exceptions so far — they now clone via the App Store · Beta tier above.
TipWant two WhatsApp accounts on one Mac? MacDupl can now clone WhatsApp directly (App Store · Beta, above) — a second WhatsApp linked as its own device. Prefer not to use the beta? Clone your browser (fully supported above) and open web.whatsapp.com in each instead.
Apple's built-in apps Not supported
Apple's own apps can’t be cloned by any tool, and the reason is lower-level than the App Store tier above. They ship pinned to their location in /System by a kernel launch constraint: macOS refuses to start a copy from anywhere else even when Apple’s signature on it is still perfectly valid. Re-signing the copy clears that constraint but strips the private entitlements the app needs to reach your library, your subscription and your devices — so one of the two always fails. There is no signing trick that satisfies both.
/System by a launch constraint. Verified hands-on against Music on macOS 26.Not supportedTipWant a second music or mail library? Use a second macOS user account and Fast User Switching. Each account gets its own library, its own sign-in and its own device syncing, and both stay logged in at once — which is the isolation a clone would have given you.
No matching app in the list — but that doesn’t mean it won’t work. Check it with the free trial, or request it below.
Don’t see your app?
Tell us which app you want to clone. Requests go straight to the developer and directly shape what gets tested and supported next — most requests for Electron or browser-based apps already work today.
This opens a pre-filled email to [email protected] — include the app’s download link if you can.